Drum holder clamp



FIG. 1 is a top, front perspective view of a drum holder clamp showing my new design;

FIG. 2 is a enlarged front view thereof;

FIG. 3 is a top rear perspective view thereof;

FIG. 4 is an enlarged rear view thereof;

FIG. 5 is an enlarged top view thereof;

FIG. 6 is an enlarged right side view thereof, the left side view being a mirror image; and

FIG. 7 is an enlarged bottom view thereof.

The broken lines in FIGS. 1, 3 and 6 are for illustrative purposes only. 

The ornamental design for a drum holder clamp, as shown and described. 